N.H. Code Admin. R. Saf-C 6009.02
No unvented space heater shall be offered for sale in New Hampshire unless it has been listed by a nationally recognized laboratory whose testing criteria, at a minimum, meet Underwriters’ Laboratory Standard 647, "Standard for Unvented Kerosene-Fired Room Heaters and Portable Heaters", Edition 2, April 16, 2010, or ANSI Z21.11.2, "Gas Fired Room Heaters", 2013 edition, both available as noted in Appendix B.
Source. (See Revision Note #1 and Revision Note #2 at chapter heading for Saf-C 6000) #13094, eff 8-25-20